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AMCHP 2005 Conference. Injuries During Pregnancy Tracking & Understanding the Hidden Epidemic. Hank Weiss PhD, Associate Professor Center for Injury Research and Control University of Pittsburgh. Pregnant women NOT wearing seatbelts 3 times more likely to experience fetal death. - PowerPoint PPT Presentation
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Injuries During PregnancyTracking & Understanding
the Hidden Epidemic
Hank Weiss PhD, Associate ProfessorCenter for Injury Research and Control
University of Pittsburgh
AMCHP 2005 Conference
Hank Weiss, Center for Injury Research & Control
Leading Cause of Maternal Injury
Maternal and Fetal Maternal and Fetal Deaths = MVDeaths = MV
Hospitalizations = MVHospitalizations = MV
ED Visits = MVED Visits = MV
Pregnant women NOT wearing seatbelts
3times more likely to experience fetal death
HydeHyde et al (ObGyn, 2003): Effect of motor vehicle crashes on birth & fetal outcomes in Utah et al (ObGyn, 2003): Effect of motor vehicle crashes on birth & fetal outcomes in Utah
Hank Weiss, Center for Injury Research & Control
Traumatic Fetal DeathsBy MechanismSelected States, 1995-1997
Weiss et al , JAMA, 2001, October 17;286(15):1862-1868
MV82%
Fall3%
Firearm6%
Other9%
H a n k W e i s s , C e n t e r f o r I n j u r y R e s e a r c h & C o n t r o l
F e t a l C r a s h D e a t h C o m p a r i s o n s , 1 9 9 8
0 2 0 0 4 0 0 6 0 0 8 0 0
L o w E s t i m a t e H i g h E s t i m a t e
1 2 5
1 7 9
1 9 0
~ 7 0 0
Why Is This Happening?
Seat Belt Syndrome• Sternum Fracture• Rib Fractures• Clavicle Fracture• Lung Injury• Heart Injury• Thoracic Aorta Injury• Bowel Perforation• Abdominal Aorta Injury• Spinal Injury• Pelvic Injury
Risk of Fetal Death
With Lap & Shoulder Belt
16 mph 26%
22 mph 51%
28 mph 76%
34 mph 90%
Research Projections based on Computer Modeling
Normal Pregnancy38 Weeks
Best Possible Case
Normal Pregnancy38 Weeks
Best Possible CasePlacenta
Normal Pregnancy38 Weeks
SUBMARINING
L 1
L 2
DISC
L 1
L 2
DISC
Wedge Shaped Fractures
Risk To Fetus
5XRisk to 0 To 1 Year Old Sibling
Lethal to the
FETUS&
MOTHER
RequiredReaction Force
To Stop Submarining
CurrentlyOnly 2 Ways To
Prevent Submarining
Crotch Strap - Pubis Load
Knee Impact - Femur Load
Crotch Strap Load To Pubis
Crotch Strap Load
Lethal to the
FETUS
Femur Load
Femur Load Works(Knee Impact With Dashboard)
UnreliableToo Late
FMVSS 208 Sets Femur Load Limits
USPTO
Prior Art
RequiredReaction
Force
High Lap Belt Force
Directly IntoAbdomen
High Lap Belt
No Pubis Contact
Lap Belt Force
All Lap Belt ForceDirectly Into
FETUS
Wide Lap Belt(Scoop Injury)
Crotch Strap
Load ConcentrationOn Neck
Load Directly To Fetus
Anything Below The Effective Lap Belt Level
That Does Not Contact The Pubis And Stabilize
The PelvisCan And Will Cause
SCOOPING INJURY
As The PelvisSubmarines
Normal Pregnancy38 Weeks
Best Possible Case
Fetus Head
Normal Pregnancy38 Weeks
SUBMARINING
Fetus HeadAfter Submarining
Fetus HeadAt Start
It’s EasyTo Get Into Trouble
In This BusinessUnless
You Know What You Are Doing
Supplemental Automotive Restraint SystemFor
Pregnant Women(SARSPM)
SARSPW
SARSPW
Solid Pubis Contact
1/2 To 1 Inch Free Space
Solid Chest Contact
Solid PelvisContact
Left & RightIlium Contact
SARSPW
Abdomen IsolatedFrom Belt Forces
Pelvis Stabilized(No Submarining)
Fetus SpaceNot Violated
Device Claim 1 – (One Page Of Two)
Device Claim 1 - (Page Two Of Two)
Device Claims 2, 3, & 4.
Device Claims 5 & 6